MAC

vim-go ( https://github.com/fatih/vim-go) completion
+ < Cmuro >
this error occurs: Omni completion (^ O ^ N ^ P) Pattern not found and the completion window has not been and cannot be used
.vimrc configuration

set nocompatible
filetype off
set number
syntax on

set rtp+=~/.vim/bundle/Vundle.vim
call vundle-sharpbegin()

Plugin "VundleVim/Vundle.vim"
Plugin "fatih/vim-go"

call vundle-sharpend()
filetype plugin indent on

go env

GOARCH="amd64"
GOBIN="/Users/zhengya/go/bin"
GOCACHE="/Users/zhengya/Library/Caches/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/zhengya/go"
GOPROXY=""
GORACE=""
GOROOT="/usr/local/go"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
CXX="clangPP"
CGO_ENABLED="1"
GOMOD=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/bt/gh05fvc17sqfhmty4bymb_s40000gn/T/go-build616434324=/tmp/go-build -gno-record-gcc-switches -fno-common"

Baidu hasn"t solved it for a long time, asking for advice